Sierra Marine 187115 O-Ring

0.315 Inch Inside Diameter x 1.735 Inch Thickness; Single; Fits Mercruiser Stern Drive/ Mercury Marine/ Johnson/ Evinrude/ OMC Stern Drive Outboard Engines

The Sierra Marine 187115 O-Ring is a replacement sealing component designed for compatible marine engine and equipment applications. Its circular profile is intended to help create a dependable seal between properly matched components, helping limit the passage of fluids, lubricants, and air through a joint. This O-ring is suited for repair, maintenance, and service work where restoring the original sealing function is required.
Use the Sierra Marine 187115 O-Ring as a direct replacement only when the part number is confirmed for your specific assembly. Proper application matching is essential because O-rings can vary by material, profile, and sealing requirements. Before installation, compare the replacement with the removed component and inspect the mating surfaces for corrosion, dirt, burrs, grooves, or other damage that could compromise the seal. Clean the installation area thoroughly and use an approved lubricant when required by the equipment manufacturer.
Installation should be completed according to the service procedures for the applicable marine system. Avoid stretching, twisting, cutting, or rolling the O-ring during placement, and do not reuse a seal that shows flattening, cracking, hardening, abrasion, or other signs of wear. The Sierra Marine brand is recognized for supplying replacement components for marine maintenance, giving service professionals and boat owners a practical option for keeping compatible equipment properly maintained. Confirm the original manufacturer’s specifications and part-number compatibility before ordering or installing this component.

Features:

• Replacement seal: Designed to restore the sealing function of compatible marine equipment and engine assemblies.

• Part-number specific: Sierra Marine part number 187115 supports accurate identification and application matching.

• Fluid sealing support: Helps limit leakage through properly matched component joints when correctly installed.

• Service-ready design: Suitable for maintenance, repair, and replacement work on compatible marine systems.

• Installation guidance: Requires clean mating surfaces, proper seating, and compliance with the equipment manufacturer’s service procedures.